Elevation adjusting mechanism and display device using the same

ABSTRACT

An elevation adjusting mechanism used for ascending or descending a monitor includes a base, a first thread bushing, a second thread bushing, a guiding bushing and a second gear. The first thread bushing including a first gear is movably connected to the base. The second thread busing is connected to the first thread busing. One end of the first thread bushing is contained in the second thread bushing. The monitor is disposed on the second thread busing. The guiding bushing is fixed at the base and covers the second thread bushing, so that the second thread bushing only moves along an elevating direction. The second gear is movably connected to the guiding busing and meshes with the first gear. When the second gear is rotated and drives the first thread bushing to rotate, the second thread busing moves along the elevating direction to ascend or descend the monitor.

This application claims the benefit of Taiwan application Serial No. 96114696, filed Apr. 25, 2007, the subject matter of which is incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates in general to an elevation adjusting mechanism and a display device using the same, and more particularly to an elevation adjusting mechanism for ascending or descending a monitor and a display device using the same.

2. Description of the Related Art

Monitors are widely used electronic products nowadays. Generally speaking, a monitor is disposed according to different requirements, such as the space arrangement or a user's preference. In order to satisfy the different requirements, an elevation adjusting mechanism for ascending or descending the monitor is applied.

Several types of the elevation adjusting mechanisms are applied to adjust the height of the monitor. The elevation adjusting mechanisms are not only used for ascending or descending the monitor but the elevation adjusting mechanisms are also used for supporting the monitor. Frames and constant force springs are usually used in the elevation adjusting mechanisms for adjusting the elevation of the monitor.

However, the frames of the elevation adjusting mechanisms are usually made of steel electrogalvanized coldrolled coil (SECC), which results in high manufacturing cost. Furthermore, the constant force springs are expensive and need long time to manufacture.

SUMMARY OF THE INVENTION

The invention is directed to an elevation adjusting mechanism and a display device using the same. A first thread bushing, a second thread bushing and a guiding bushing cooperate with one another for ascending or descending a monitor.

According to a first aspect of the present invention, an elevation adjusting mechanism for ascending or descending a monitor is provided. The elevation adjusting mechanism includes a base, a first thread bushing, a second thread bushing, a guiding bushing and a second gear. The first thread bushing is movably connected to the base and includes a first gear. The second thread bushing is connected to the first thread bushing. One end of the first thread bushing is contained in the second thread bushing. The monitor is disposed on the second thread bushing. The guiding bushing is fixed at the base and covers the second thread bushing, so that the second thread bushing only moves along an elevating direction. The second gear is movably connected to the guiding bushing and meshes with the first gear. When the second gear is rotated and drives the first thread bushing to rotate, the second thread bushing moves along the elevating direction to ascend or descend the monitor.

According to a second aspect of the present invention, a display device is provided. The display device includes a monitor and an elevation adjusting mechanism. The elevation adjusting mechanism is for ascending or descending the monitor. The elevation adjusting mechanism includes a base, a first thread bushing, a second thread bushing, a guiding bushing and a second gear. The first thread bushing is movably connected to the base and includes a first gear. The second thread bushing is connected to the first thread bushing. One end of the first thread bushing is contained in the second thread bushing. The monitor is disposed on the second thread bushing. The guiding bushing is fixed at the base and covers the second thread bushing, so that the second thread bushing only moves along an elevating direction. The second gear is movably connected to the guiding bushing and meshes the first gear. When the second gear is rotated and drives the first thread bushing to rotate, the second thread bushing moves along the elevating direction to ascend or descend the monitor.

The invention will become apparent from the following detailed description of the preferred but non-limiting embodiments. The following description is made with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an elevation adjusting mechanism according to a preferred embodiment of the present invention;

FIG. 2 illustrates an exploded view of the first thread bushing in FIG. 1;

FIG. 3 illustrates a perspective view of the guiding bushing in FIG. 1;

FIGS. 4A˜4D illustrate parts of the elevation adjusting mechanism in FIG. 1; and

FIG. 5 is a partial enlarged view of FIG. 4D.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIG. 1, an elevation adjusting mechanism according to a preferred embodiment of the present invention is illustrated. The elevation adjusting mechanism 100 disposed at a display device 1000 is used for ascending or descending a monitor 800. The elevation adjusting mechanism 100 includes a base 200, a first thread bushing 300, a second thread bushing 400, a guiding bushing 500 and a second gear 620.

Referring to both FIG. 1 and FIG. 2, FIG. 2 illustrates an exploded view of the first thread bushing in FIG. 1. The first thread bushing 300 including a first gear 320 is movably connected to the base 200. The rotation axis of the first gear 320 is substantially parallel to that of the first thread bushing 300.

As shown in FIG. 1, the second thread bushing 400 is connected to the first thread bushing 300. One end of the first thread bushing 300 is contained in the second thread bushing 400. The monitor 800 is disposed on the second thread bushing 400.

The guiding bushing 500 is fixed at the base 200. The guiding bushing 500 covers the second thread bushing 400, so that the second thread bushing 400 only moves along an elevating direction D1. The second gear 620 is movably connected to the guiding bushing 500 and meshes with the first gear 320. When the second gear 620 is rotated and drives the first thread bushing 300 to rotate, the second thread bushing 400 moves along the elevating direction D1 to ascend or descend the monitor 800.

As shown in FIG. 1, a rotation mechanism 700 can be, for example, disposed on the second thread bushing 400. The rotation mechanism 700 coupled to a back side of the monitor 800 is used for adjusting an inclination angle θ1 of the monitor 800, so that both the height and the inclination angle θ1 of the monitor 800 are adjusted by the elevation adjusting mechanism 100.

The arrangement and the operation of the components of the elevation adjusting mechanism 100 are illustrated in details as follows. As shown in FIG. 1, the base 200 of the elevation adjusting mechanism 100 includes a weight portion 210 and a containing portion 230. The weight portion 210 is disposed at a side of the base 200 for counterbalancing the weight of the monitor 800. Therefore, the falling of the elevation adjusting mechanism 100 resulting from the unbalanced weight would not take place easily. The containing portion 230 is disposed relatively to and coupled to the weight portion 210.

Referring to FIG. 3, a perspective view of the guiding bushing in FIG. 1 is illustrated. The guiding bushing 500 can be, for example, composed of two cases 520 and 530. The case 520 has at least one hook 520 a, and the case 530 has at least one groove 530 a. The hook 520 a is disposed with respect to the groove 530 a. The hook 520 a is for inserting into the groove 530 a so as to combine the case 520 and the case 530. The structure of the hook and the groove can simplify the manufacture of the guiding bushing 500.

Referring to FIGS. 4A˜4D, parts of the elevation adjusting mechanism in FIG. 1 are illustrated. Some components are not shown in FIGS. 4A˜4D for illustrating the operation of the elevation adjusting mechanism 100 more clearly, but the invention is not limited thereto. As shown in FIG. 4A, the elevation adjusting mechanism 100 (as shown in FIG. 1) further includes a handle 650, and the guiding bushing 500 has a handle receiver 550. The handle receiver 550 positioned at an outer wall of the guiding bushing 500 is used for containing the handle 650.

The handle 650 disposed on the same axis with the second gear 620 is used for driving the second gear 620 to rotate. A user can easily hold and rotate the handle 650 for driving the second gear 620 to rotate. Furthermore, the containing portion 230 has a recess 232. As shown in FIG. 4B, the first thread bushing 300 is disposed in the recess 232. For clearly illustrating the position of the first thread bushing 300 disposed in the recess 232, the guiding bushing 500 (as shown in FIG. 4A) is not shown in FIG. 4B.

As stated above, the first gear 320 is a part of the first thread bushing 300 and meshes with the second gear 620. Therefore, when the second gear 620 rotates, the first gear 320 and the first thread bushing 300 are driven to rotate. Meanwhile, the first thread bushing 300 moves within the recess 232.

Then, as shown in FIG. 4C, the first thread bushing 300 has an external thread surface 310, and the second thread bushing 400 has an internal thread surface 410. The external thread surface 310 is connected to the internal thread surface 410, so that the second thread bushing 400 is driven to move when the first thread bushing 300 rotates. Preferably, only a few threads are needed to be disposed on the internal thread surface 410 to connect to the external thread surface 310. In addition, the elevation stroke of the second thread bushing 400 along the elevating direction D1 depends on the number of the threads of the external thread surface 310.

Referring to FIG. 4D and FIG. 5, FIG. 5 is a partial enlarged view of FIG. 4D. Only a part of the guiding bushing 500 is shown in FIG. 5. When the first thread bushing 300 rotates, the second thread bushing 400 is restricted by the guiding bushing 500. As a result, the movement of the second thread bushing 400 is changed from the spiral movement to the elevation movement along the elevating direction D1 only. In order to restrict the second thread bushing 400 to move along the elevating direction D1, the guiding bushing 500 and the second thread bushing 400 include several guiding ribs 540 and guiding grooves 440, respectively. The guiding ribs 540 are disposed at an inner wall of the guiding bushing 500. The guiding grooves 440 are positioned on an outer wall of the second thread bushing 400. When the second thread bushing 400 is driven by the first thread bushing 300 and the guiding ribs 540 cooperate with the guiding grooves 440, the second thread bushing 400 moves along the elevating direction D1 only. In other words, the movement of the second thread bushing 400 is converted from the spiral movement to the straight movement, so that the monitor 800 (as shown in FIG. 1) is driven to elevate.

The number of the guiding ribs 540 corresponds to the number of the guiding grooves 440. Although the guiding bushing 500 and the second thread bushing 400 respectively include several guiding ribs 540 (as result of the viewing angle, only one guiding rib 540 is shown in FIG. 5) and guiding grooves 440, the number of the guiding ribs and the number of the guiding grooves are not limited thereto. As shown in FIG. 5, preferably, one end of each of the guiding grooves 440 has a side wall 442 for preventing the second thread bushing 400 from separating from the guiding bushing 500 when elevating. Furthermore, when the second thread bushing 400 ascends to the highest position (as shown in FIG. 5) along the elevating direction D1, the second thread bushing 400 is positioned at a predetermined position as result of the disposition of the side wall 442.

Moreover, as shown in FIG. 4D, the elevation adjusting mechanism 100 (as shown in FIG. 1) preferably further includes a buffer positioning shaft 330 disposed on the top of the first thread bushing 300. A buffer spring 630 surrounds the buffer positioning shaft 330 and is compressed for providing supporting force to the monitor 800 (as shown in FIG. 1).

The first thread bushing 300, the second thread bushing 400 and the guiding bushing 500 are preferably made of plastic to reduce the manufacturing cost and time.

The elevation adjusting mechanism and the display device using the same according to the above embodiment of the present invention are used for ascending or descending the monitor. The first thread bushing, the second thread bushing and the guiding bushing cooperate with one another for adjusting the elevation of the monitor. Furthermore, the first gear, the second gear and the handle are disposed at the elevation adjusting mechanism, so that a user can easily adjust the elevation of the monitor. Because the components of the elevation adjusting mechanism, such as the first thread bushing, the second thread bushing and the guiding bushing, can be made of plastic, the manufacturing cost and time of the elevation adjusting mechanism are reduced.

While the invention has been described by way of example and in terms of a preferred embodiment, it is to be understood that the invention is not limited thereto. On the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures. 

1. An elevation adjusting mechanism for ascending or descend a monitor, comprising: a base; a first thread bushing movably connected to the base and comprising a first gear; a second thread bushing connected to the first thread bushing, wherein one end of the first thread bushing is contained in the second thread bushing, and the monitor is disposed on the second thread bushing; a guiding bushing fixed at the base and covering the second thread bushing, so that the second thread bushing only moves along an elevating direction; and a second gear movably connected to the guiding bushing and meshing with the first gear, wherein when the second gear is rotated and drives the first thread bushing to rotate, the second thread bushing moves along the elevating direction to ascend or descent the monitor.
 2. The elevation adjusting mechanism according to claim 1, wherein the base comprises: a weight portion disposed at a side of the base for counterbalancing the weight of the monitor; and a containing portion disposed relatively to and coupled to the weight portion, wherein the containing portion has a recess and the first thread bushing rotates within the recess.
 3. The elevation adjusting mechanism according to claim 1, further comprising: a buffer spring surrounding a buffer positioning shaft of the first thread bushing for supporting the monitor.
 4. The elevation adjusting mechanism according to claim 3, wherein the buffer spring is substantially compressed.
 5. The elevation adjusting mechanism according to claim 1, wherein the guiding bushing has at least one guiding rib disposed on an inner wall of the guiding bushing, and the second thread bushing has at least one guiding groove positioned on an outer wall of the second thread bushing for cooperating with the guiding rib, so that the second thread bushing only moves along the elevating direction.
 6. The elevation adjusting mechanism according to claim 5, wherein one end of the guiding groove has a side wall for preventing the second thread bushing from separating from the guiding bushing when elevating.
 7. The elevation adjusting mechanism according to claim 5, wherein the guiding bushing has a plurality of guiding ribs, the second thread bushing has a plurality of guiding grooves, and the number of the guiding grooves corresponds to the number of the guiding ribs.
 8. The elevation adjusting mechanism according to claim 1, wherein the guiding bushing is composed of two cases, the cases have at least one hook and at least one groove respectively, the hook is disposed with respect to the groove, and the hook is used for inserting into the groove so as to combine the cases.
 9. The elevation adjusting mechanism according to claim 1, further comprising a handle, wherein the handle disposed on the same axis with the second gear is used for driving the second gear to rotate.
 10. The elevation adjusting mechanism according to claim 9, wherein the guiding bushing has a handle receiver positioned at an outer wall of the guiding bushing, wherein the guiding bushing is used for containing the handle.
 11. The elevation adjusting mechanism according to claim 1, further comprising: a rotation mechanism disposed on the second thread bushing and coupled to a back side of the monitor, wherein the rotation mechanism is used for adjusting an inclination angle of the monitor.
 12. The elevation adjusting mechanism according to claim 1, wherein the first thread bushing has an external thread surface, the second thread bushing has an internal thread surface, and the external thread surface is connected to the internal thread surface.
 13. A display device, comprising: a monitor; and an elevation adjusting mechanism for ascending or descending the monitor, the elevation adjusting mechanism as claimed in claim
 1. 